Dinh Thi Hong Van; Hoang Quoc Viet; Pham Thi Hanh. LESSON STUDY IN HIGH SCHOOLS IN EA H’LEO DISTRICT, DAK LAK PROVINCE WITHIN THE CONTEXT OF EDUCATIONAL INNOVATION: THE RELATIONSHIP WITH TEACHERS’ PROFESSIONAL DEVELOPMENT. UED Journal of Social Sciences, Humanities and Education, v. 11, n. 1, p. 104-112, 21 Jun. 2021.